Thermostatic device



H. E. REM/E.- THERMosTATICDE-vlcs. APPLICATION FILED JULY 8, I9 2I.'

1,400,238. Patented 1110.13, 1921.

`UNITED sT-ATEs PATENTv OFFICE.

HENRY E. REEVE, OIEv BROOKLYN, NEW' YORK.

THERMOSTATIC DEVICE.

Application led July 8, 1921.

To all whom t may concern.'

Be it known that I, HENRY E. REEVE, a citizen of the United States of America, residing at Brooklyn, New York, have invented -a new and useful Thermostatic Device, of which the following is a specification. v

My invention relates particularly to a switch adapted to` operate automatically. with variations in temperature.

The main object is to provide `a simple -but reliable switch which will operate at a improvements of my invention, part of the cover being broken away and partsbeing shown in section.

Fig. 2 is a side view and partial longitudi;

nal section thereof.

Fig. 3 is a transverse sectional view on the plane of the .line 3-3 o-f Fig. .1.

Fig. 4 is a detail view showing one of the elements in full lines in the normal position of rest and in dot and dash lines in the position which it would occupy under increased .temperature conditions. v

Fig. 5 is a perspective view of the support for the ther O Static members.

Fig. 6 is a viewfof a modified form of a' construction. f 4

The thermostatic element or arm 10 is formed of two -metals' of dilfering thermal coefficients' of expansion supported in two cross plates 11 and 12. Preferabl these cross plates are formed as flanges o a base plate 13. In the preferred form of con- 4 struction there is a secondA thermostatic element l0 similarly supported by the cross v plates 11 and 12. The electricA contacts are preferably carried by the ends of arms 14 and 14 .which are suitably secured to but Specification of Letters Patent.

Patented Dec. 13, 1921.

serial No. 483,169.

insulated from the respective thermostatic elements 10 and 10. Preferably, the thermostatic elements are supported in perforations or slots in the cross plates 11 and 12. Springs, such as 15, may be interposed to hold the thermostatic elements snugly in place. Relative longitudinal movement of the thermostatic elements in one direction may be prevented bya transverse pin 16.

When the thermostatic element is heated it tends to warp-or bend, as indicated in Flg. 4, the points of support in the cross plates 11 and 12 serving as abutments or fulcrum points. By this .construction I am enabled to accurately locate the thermostatic elements with respect to each other and hold ,the parts in their proper relative positions so that they are substantially unaeoted by vibration. It is also possible in this way to securely hold the thermostatic elements in place without the use of solder or similar slidingly assembled on the body. The body and cover are preferably provided with openings such as 19 in that part of the casing which incloses the active portions of the thermostatic elements so that they will respond quickly to changes in temperature. To position the thermostatic elements y I preferably provide the casing with one or more lugs such as 20 adapted to project into a slot 21 in the base of the support 13. The ends of the casing are preferably closed by members 22 and 12 and the member 11 forms a partition between the chamber which contains the active portions of athermostatic element and the chamber containing thel movable contacts. The member 22 is preferably of insulation and provided with passages for the conductors 23-23 which are secured to anchorage portions such as 24 and 24', which in turn are electrically connected to the contact arms 14-14 vent the wire from being pushed in or pulled out. It will be obvious that the pushing in of a wire might short circuit the device and a pull upon a wire if transmitted to a thermostatic element would interfere with its action. To hold the members 22 and 25 in place I may bend over portions of the casing as at 27 and 28. The members 22 and 25 constitute strain relieving means for the conductors.

In the construction shown in Fig. 6, the contact arms 30 and 30 .are carried by the casing but insulated therefrom, and are adapted to be separated by the warping movements of the thermostatic elements 31 and 31. I wish it understood that other changes in the construction may be made without departing from the spirit or scope of my invention.-

I claim:

1. In a thermostatic device, a casing, a cover therefor, a thermostatic element within said casing, a contact operated thereby, a partition dividing the casing into two chambers, said casing having perforations in the part which contains the thermostatic element, the other part of the casing being closed to keep out foreign matter.

2. In a thermostatic device, a casing, a partition in said casing, a thermostatic element supported in one end of said casing and supported by said partition, and a contact in the other part of the casing operated by said thermostatic element.

3. In a thermostatic device, a casing having side anges, a cover slidably engaging therewith, a thermostatic element removably mounted in said casing, a contact operated thereby, and strain relieving means for a conductor in one end of said casing.

'4. In a thermostatic device, a casing having a removable cover, a support mounted in said casing, a thermostatic element having its opposite ends supported by said support, and a contact operated by said thermostatic element.

5. In a thermostatic l device, a troughshaped member, a support mounted therein and having llanges, a thermostatic element supported by said flanges, and a cover for said trough-shaped member.4

6. In a thermostatic device, a support having end flanges,a laterally warping thermostatic element having its opposite ends supported in said flanges, so that said element can warp between said flanges and a contact member operated by said thermostatic element.

7'. In a thermostatic device, a support having perforated flanges, and a laterally warping thermostatic element 'supported in the perforations in said flanges, so that said element can warp between said flanges.

8. In a thermostatic device, a pair of relatively fixed plates, two laterally warping thermostatic elements supported thereby at .their ends' and spring means interposed between said thermostatic elements.

9. A thermostatic device, a base plate, two flanges extending therefrom at opposite ends thereof, two thermostatic elements each supported by both of said 'flanges 10. A thermostatic device, a casing, a base plate supported within said casing and having spaced apart flanges, one of which forms a closure for one end of said casing, the other of which forms a partition in said casing, a thermostatic element carried by said flanges, a contact operable by said thermostatic element, and a closure -for said casing.

11. A thermostatic device, a casing having a lug projecting inwardly therefrom', a base plate having a recess for said lug, a thermostatic element supported by said base plate and a cover for said casing.

12. In a thermostatic device, two perforated supporting members, a thermostatic element supported in said perforated members, and means for preventing longitudinal f movement of said element in one direction in said supporting members.

13. In a thermostatic device, a casing having a partition dividing it into two compartments, one of which is closed and the other ventilated, a thermostatic member in the ventilated compartment and extending through said partition, and a contact in said closed compartment operated by said thermostatic member.

14. In a thermostatic device, a casing, a partition dividing said casing into two chambers, one of which is ventilated, the other dirt-proof, a thermostatic element mounted `in said ventilated chamber, one end of, or an extension of, said thermostatic element being supported by and. passing throu h said partition, the other end supported in.a manner not retarding to the practical action of the thermostatic element when the latter is influenced by changes in temperature, and a contact mounted in said dirt-proof chamber and operated by said thermostatic element. i

15. In a thermostatic'device, a casing, a partition dividing said casing into two chambers, one of which is ventilated, the other dirt-proof, and two thermostatic elements mounted in the ventilated chamber and arranged substantially parallel, one end of, or an extension of, each passing through and supported by said partition, the other end of each supported in a manner not tending to retard the action ofV said thermostatic elements when they are influenced by changes in temperature.

16. In a thermostatic device, two supports, a laterally warping thermostatic 'element having its opposite ends supported by said supports, and a contact member operated by said thermostatic element.

vhaving perforated flanges, and a laterally warping thermostatie element supported in the perforations .of said flanges and in a manner permitting that portion between said flanges to change its form laterally with change in temperature.

18. In a thermostatio device, a pair of relatively fixed plates, two laterally warping thermostatic elements supported at ltheir ends by said plates, and spring means applied at the ends of said thermostatie ele- 'ments to insure Contact with, said. supporting plates.

19. In a thermostatic device, two relatively fiXed supports, a laterally warping thermostatio element supported by said supports, anda spring bearing laterally against said thermostatic element near one end of said element.

20. In a thermostatic device, a laterally warping thermostatic element supported at both ends, one end passing through and supported by a perforated plate, and spring means applied to the said theimostatie element toward the end supported in said perforated plate.

21. In a thermostatic device, a base plate, two flanges extending therefrom at opposite ends thereof, and two laterally warping thermostatio elements each supported at both ends by both 1of said anges.

HENRY E. REEVE. 

